<template>
  <div>
    <h1>当前求和值为:{{ sum }}</h1>
    <h1>当前求和值乘以是为:{{ bigSum }}</h1>
    <h2>我在{{ school }}学习{{ subject }}</h2>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment(n)">加</button>
    <button @click="decrement(n)">减</button>
    <button @click="incrementOdd(n)">当前求和为奇数再加</button>
    <button @click="incrementWait(n)">等等再加</button>
  </div>
</template>

<script>
import { mapState, mapGetters, mapMutations, mapActions } from "vuex";
export default {
  name: "Count",
  data() {
    return {
      n: 1,
    };
  },
  computed: {
    //mapState 获取 store 中的数据(对象写法)
    // ...mapState({ sum: "sum", subject: "subject", school: "school" }),

    // mapState 获取 store 中的数据(数组写法)
    ...mapState(["sum", "subject", "school"]),
    /* *************************************************************** */
    //mapGetters 获取 store 中的数据(对象写法)
    // ...mapGetters({ bigSum: "bigSum" }),
    //mapGetters 获取 store 中的数据(数组写法)
    ...mapGetters(["bigSum"]),
  },
  methods: {
    // increment() {
    //   this.$store.commit("JIA", this.n);
    // },
    // decrement() {
    //   this.$store.commit("JIAN", this.n);
    // },
    //借助mapMutations生成对应的方法，方法中会调用commit取联系mutations(对象写法)
    ...mapMutations({ increment: "JIA", decrement: "JIAN" }),
    //借助mapMutations生成对应的方法，方法中会调用commit取联系mutations(数组写法)
    // ...mapMutations(["JIA", "JIAN"]),
    /* ******************************************* */
    // incrementOdd() {
    //   this.$store.dispatch("jiaOdd", this.n);
    // },
    // incrementWait() {
    //   this.$store.dispatch("jiaWait", this.n);
    // },
    //借助mapActions生成对应的方法，方法中会调用dispatch取联系actions(对象写法)
    ...mapActions({ incrementOdd: "jiaOdd", incrementWait: "jiaWait" }),
    //借助mapActions生成对应的方法，方法中会调用dispatch取联系actions(数组写法)
    // ...mapActions(["jiaOdd", "jiaWait"]),
  },
};
</script>
